We experienced several times that some fields that are conditioned to show collapsed if the value entered was wrong.
For example, in one field we asked if they have mobile subscriiption. If the user answers 'Yes', then a number field with limited character length appears.If the user then enters a value that exits the specified no. of characters, or a letter and submits order, nothing happens. The number field automatically gets hidden and the error message is thereby not visible. This is very confusing for the user.
We will appreciate it very much if someone could tell us what we did wrong, and how to correct the error. Thanks.